http://en.wikipedia.org/wiki/Participatory_note
this was by far he best example for me which even i have been a part of myself as a normal trader , i was not a technical guy back then , but when i see it today , it proves me that no government intervention can change the long term trends in hours or even days , and probably no intervention of the government can decide the long term trends of the markets ever , markets has its own mood and pace , it changes its directions/trends when it wants to , but slowly and steadily , any intervention by governments lasts only for few hours at best.
we must note that when markets plummeted after 3 months in jan 08 , even that it was due to other factors , and for me those factors were that the trand had exhausted after 5 years of big bull run, the global melt down was only a a starting point which coincided with the trend reversal, which was not unusual , because it always happens with some kind of news in background , however a technical analyst knows market was exhausted on daily and weekly charts